Effects of $\rho$-meson width on pion distributions in heavy-ion collisions

Abstract

The influence of the finite width of $\rho$ meson on the pion momentum distribution is studied quantitatively in the framework of the S-matrix approach combined with a blast-wave model to describe particle emissions from an expanding fireball. We find that the proper treatment of resonances which accounts for their production dynamics encoded in data for partial wave scattering amplitudes can substantially modify spectra of daughter particles originating in their two body decays. In particular, it results in an enhancement of the low-$p_T$ pions from the decays of $\rho$ mesons which improves the quantitative description of the pion spectra in heavy ion collisions obtained by the ALICE collaboration at the LHC energy.

5 pages, 2 figures, version appeared in phys. lett. b

References in corpus (7)

• The equation of state in (2+1)-flavor QCD
• Freeze-out Conditions in Heavy Ion Collisions from QCD Thermodynamics
• Therminator: Thermal heavy-Ion generator
• Hadron yields and the phase diagram of strongly interacting matter
• An overview of the experimental study of quark-gluon matter in high-energy nucleus-nucleus collisions
• Influence of temperature dependent shear viscosity on elliptic flow at back- and forward rapidities in ultrarelativistic heavy-ion collisions
• Particle production in p-p collisions and prediction for LHC energy

Cited by in corpus (30)

• Pseudorapidity distribution and decorrelation of anisotropic flow within CLVisc hydrodynamics
• Estimating initial state and quark-gluon plasma medium properties using a hybrid model with nucleon substructure calibrated to $p$-Pb and Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• The thermal proton yield anomaly in Pb-Pb collisions at the LHC and its resolution
• Hadron Resonance Gas with Repulsive Interactions and Fluctuations of Conserved Charges
• Finite resonance widths influence the thermal-model description of hadron yields
• Temperature dependence of $\eta /s$ of strongly interacting matter: effects of the equation of state and the parametric form of $(\eta /s)(T)$
• Multiplicity dependence of (multi-)strange baryons in the canonical ensemble with phase shift corrections
• S-matrix analysis of the baryon electric charge correlation
• Fast resonance decays in nuclear collisions
• Bayesian parameter estimation for relativistic heavy-ion collisions
• S-matrix formulation of thermodynamics with N-body scatterings
• Global fluid fits to identified particle transverse momentum spectra from heavy-ion collisions at the Large Hadron Collider
• Interacting hadron resonance gas model in K-matrix formalism
• Longitudinal Dynamics of High Baryon Density Matter in High Energy Heavy-Ion Collisions
• Thermodynamics of strange baryon system from coupled-channel analysis and missing states
• Parity doubling of baryons in a chiral approach with three flavors
• Hadron resonance gas with van der Waals interactions
• Constraining baryon annihilation in the hadronic phase of heavy-ion collisions via event-by-event fluctuations
• Fluctuations near the liquid-gas and chiral phase transitions in hadronic matter
• Thermodynamics of a gas of hadrons with attractive and repulsive interaction within S-matrix formalism
• Resonance decay dynamics and their effects on $p_T$-spectra of pions in heavy-ion collisions
• Density of States of a Coupled-Channel System
• Non-equilibrium components in very low transverse momentum region in high-energy nuclear collisions
• Interplay between chiral dynamics and repulsive interactions
• Estimating transport coefficients of interacting pion gas with K-matrix cross sections
• Initial conditions of bulk matter in ultrarelativistic nuclear collisions
• Centrality dependence of freeze-out temperature fluctuations in Pb-Pb collisions at the LHC
• Quantification of the low-$p_{\mathrm{T}}$ pion excess in heavy-ion collisions at the LHC and top RHIC energy
• Mapping properties of the quark gluon plasma in Pb-Pb and Xe-Xe collisions at energies available at the CERN Large Hadron Collider
• Quenching through the QCD chiral phase transition